code: def test_dataframe_dir():
      df = DataFrame(
          pd.DataFrame(np.random.rand(4, 3), columns=list("ABC"))
      )
      dir_result = set(dir(df))
      for c in df.dtypes.index:
          assert c in dir_result
  
imports: import operator
  from collections import OrderedDict
  from numbers import Integral
  from typing import List, Dict
  import numpy
  import pandas
  import pytest
  from ...config import option_context
  from ...core import tile
  from ...utils import Timer
  from ..core import IndexValue
  from ..initializer import DataFrame, Series, Index
  from ..utils import decide_dataframe_chunk_sizes, decide_series_chunk_size, split_monotonic_index_min_max, build_split_idx_to_origin_idx, parse_index, filter_index_value, infer_dtypes, infer_index_value, validate_axis, fetch_corner_data, make_dtypes, build_concatenated_rows_frame, merge_index_value, auto_merge_chunks, whether_to_clean_up
label_desc: Use image node_id 12 for calling a global function with example usage: test_dataframe_dir() without return types